Insecticide and process of making the same



Patented May 16, 1939 I l v UNITED STATES PATENT OFFICE 2,158,241 INSECTIOIDE AND rnocnss or MAKING THE SAME Sisto E. Marsico, Aspinwall, Pa.

No Drawing. Application ,June 18, 1936, Serial No. 86,000

2 Claims. (Cl. 167-24) This invention relates to a liquid insecticide solution. An important discov r ch I ave comprising an intimate and substantially stable made is nnxture or dispersion of a rotenone solution, a pine oil are necessary to bring about a complete such insecticide. sulphate solution, and to maintain such mixture An object of the present invention is to provide or dispersion substantially stable. In other an intimate and substantially stable mixture of Words, the active ingredients will remain inti- 10 eificient insecticide for spraying purposes when stantially indefinitely, and this is true when the highly diluted in water and which will give a resulting concentrated mixture or preparation is pension in which the active ingredients are thorh ghly diluted in water for spraying purposes, oug-hly dispersed and intimately mixed. unless all of them are employed together and 25 In carrying out my invention, conmiercially in substantially the proportions set forth above. pure or 90% rotenone is dissolved in chloroform At the same time, the simultaneous use of all of liniment (U. S. P.), in substantially the proporthese poisons or active ingredients naturally tions of 1 gram of rotenone to 40 cc. of chlorowidens the range of use and efiectiveness of the form linimen I have found that the chloroinsecticide as regards the kind of insects which 30 form liniment not only causes the rotenone to may be destroyed thereby.

quickly and completely dissolve, but the resulting The present invention has been evolved as the mercially pure or 90% nicotine, in the proportions ously, no satisfactory or efficient insecticide can of substantially 20% of rotenone solution, 20% be had unless there is a substantially stable disof pyrethrin solution, 10% pine oil, 15% green soap persion or suspension of the active ingredients solution, 30% nicotine, and 5%. copper sulphate and an intimate or thorough mixture thereof.

It is to be understood that the term chloroform liniment, as used herein, refers to the composition, or its full equivalent, given in the Xth edition of the U. S. P. and composed of chloroform and 70% camphor soap liniment, the camphor soap liniment being composed of hard gr., oil of Rosemary 10 cc., alcohol '700 cc. and sufficient distilled water to make 1000 cc. of the camphor soap liniment. I have found that chloroform liniment produces a better solution than chloroform and has the advantage of being an emulsifing, wetting and spreading agent. Also, rotenone dissolved in chloroform will separate out in a short time, but when it is dissolved in chloroform liniment it remains sufficiently permanently dissolved for all practical purposes so as to provide an ideal solution for insecticidal use.

Having thus described my invention, claim as new is:

1. In an insecticide, a rotenone solution consisting of commercially pure rotenone dissolved in chloroform liniment in about the proportions of 1 gram of rotenone to 40 cc. of chloroform liniwhat I ment, the chloroform liniment being composed of about 30% chloroform and about 70% camphor soap liniment, and the camphor soap liniment being composed of hard soap, camphor oil, oil of Rosemary, alcohol and distilled water in the proportions of hard soap 60 gr., camphor oil gr., oil of Rosemary 10 cc., alcohol 700 cc., and sufficient distilled water to make 1000 cc. of the camphor soap liniment.

2. In an insecticide, a pyrethrin solution consisting of the liquid extract of pyrethrum flowers macerated in chloroform liniment in about the proportions of 2 ounces of pyrethrum flowers to 400 cc. of chloroform liniment, the chloroform liniment being composed of about 30% chloroform and about 70% camphor soap liniment, and the camphor soap liniment being composed of hard soap, camphor oil, oil of Rosemary, alcohol and distilled water in the proportions of hard soap gin, camphor oil 45 gr., oil of Rosemary 10 cc., alcohol 700 cc., and suflicient distilled water to make 1000 cc. of the camphor soap liniment.

SISTQ E.- MARSICO. 

